Method and apparatus for controlling transmission signal power by terminal in wireless communication system

Abstract

Provided is a method of signal transmission and reception for a user equipment (UE) in a mobile communication system. The method may include: receiving configuration information for discovery signals from a base station (ENB); determining a transmission resource for a discovery signal on the basis of the received configuration information; and sending a discovery signal utilizing a transmit power determined based on the position of the transmission resource and the configuration information. Accordingly, it is possible to reduce interference effects caused by UEs transmitting a signal and improve communication performance in a mobile communication system.

The invention claimed is: 
     
       1. A method for communication of a terminal in a mobile communication system, the method comprising:
 receiving, from a base station, configuration information including information on a transmission power offset for a discovery signal; 
 identifying a transmission resource for the discovery signal on a symbol in a discovery duration and a resource for a physical uplink control channel on the symbol in the discovery duration; 
 determining an offset value for a transmission power of the discovery signal based on the information on the transmission power offset and a location relationship between the transmission resource for the discovery signal on the symbol in the discovery duration and the resource for the physical uplink control channel on the symbol in the discovery duration; 
 determining the transmission power of the discovery signal based on the offset value; and 
 transmitting the discovery signal based on the transmission power. 
 
     
     
       2. The method of  claim 1 , wherein the offset value is a negative value, and
 wherein an absolute value of the offset value corresponds to a distance between a location of the transmission resource for the discovery signal and a location of the transmission resource for the physical uplink control channel. 
 
     
     
       3. The method of  claim 1 , wherein the transmission power is determined based on frequency information of the transmission resource for the discovery signal. 
     
     
       4. The method of  claim 1 , further comprising receiving, from the base station, a reference signal,
 wherein the transmission power is determined based on a path loss identified based on the received reference signal. 
 
     
     
       5. A method for communication of a base station in a mobile communication system, the method comprising:
 identifying configuration information including information on a transmission power offset for a discovery signal; and 
 transmitting, to a terminal, the configuration information, 
 wherein an offset value for a transmission power of the discovery signal is determined based on the information on the transmission power offset and a location relationship between a transmission resource for the discovery signal on a symbol in a discovery duration and a resource for a physical uplink control channel on a symbol in a discovery duration, 
 wherein the transmission power of the discovery signal is determined based on the offset value. 
 
     
     
       6. The method of  claim 5 , wherein the offset value is a negative value, and
 wherein an absolute value of the offset value corresponds to a distance between a location of the transmission resource for the discovery signal and a location of the resource for the physical uplink control channel. 
 
     
     
       7. The method of  claim 5 , wherein the transmission power is determined based on frequency information of the transmission resource for the discovery signal. 
     
     
       8. The method of  claim 5 , further comprising transmitting, to the terminal, a reference signal,
 wherein the transmission power is determined based on a path loss identified based on the transmitted reference signal. 
 
     
     
       9. A terminal in a mobile communication system, the terminal comprising:
 a transceiver; and 
 a controller coupled with the transceiver and configured to:
 receive, from a base station, configuration information including information on a transmission power offset for a discovery signal, 
 identify a transmission resource for the discovery signal on a symbol in a discovery duration and a resource for a physical uplink control channel on the symbol in the discovery duration, 
 determine an offset value for a transmission power of the discovery signal based on the information on the transmission power offset and a location relationship between the transmission resource for the discovery signal on the symbol in the discovery duration and a resource for the physical uplink control channel on the symbol in the discovery duration, 
 determine the transmission power of the discovery signal based on the offset value, and 
 transmit the discovery signal based on the transmission. 
 
 
     
     
       10. The terminal of  claim 9 , wherein the offset value is a negative value, and
 wherein an absolute value of the offset value corresponds to a distance between a location of the transmission resource for the discovery signal and a location of the resource for the physical uplink control channel. 
 
     
     
       11. The terminal of  claim 9 , wherein the transmission power is determined based on frequency information of the transmission resource for the discovery signal. 
     
     
       12. The terminal of  claim 9 , wherein the controller in further configured to receive, from the base station, a reference signal,
 wherein the transmission power is determined based on a path loss identified based on the received reference signal. 
 
     
     
       13. A base station in a mobile communication system, the base station comprising:
 a transceiver; and 
 a controller coupled with the transceiver and configured to:
 identify configuration information including information on a transmission power offset for a discovery signal, and 
 transmit, to a terminal, the configuration information, 
 
 wherein an offset value for a transmission power of the discovery signal is determined based on the information on the transmission power offset and a location relationship between a transmission resource for the discovery signal on a symbol in a discovery duration and a resource for a physical uplink control channel on the symbol in the discovery duration, and 
 wherein the transmission power of the discovery signal is determined based on the offset value. 
 
     
     
       14. The base station of  claim 13 , wherein the offset value is a negative value, and
 wherein an absolute value of the offset value corresponds to a distance between a location of the transmission resource for the discovery signal and a location of the resource for the physical uplink control channel. 
 
     
     
       15. The base station of  claim 13 , wherein the transmission power is determined based on frequency information of the transmission resource for the discovery signal. 
     
     
       16. The base station of  claim 13 , wherein the controller is further configured to transmit, to the terminal, a reference signal,
 wherein the transmission power is determined based on a path loss identified based on the transmitted reference signal.